I produced the structural features of non-power fan
Rain Shi can automatically cleaning no power wind machine, waterproof ended leak: no power wind machine in design Shang is absolute anti-rain of, it has of Turbo leaves in TRANS-Shi produces centrifugal force, will indoor of air discharge block rain of entered, and leaves and leaves Zhijian due to fast of rotating, formed leaves mutual filled BU Kuang to idle, even attached in leaves Shang of small raindrops, also because Turbo Shang of lone shaped leaves after special design guided rain along leaves living roof, does not inflow Turbo inside. Therefore, no power waterproof fan is the best, waterproof and leak and 100%.